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Plant Divisions

Plant Divisions - Plant Diversity The Evolution and...

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Plant Diversity The Evolution and Classification of Plants
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What do I know about plants? True or False 1. All plants perform photosynthesis. 2. All plants need water and nutrients. 3. All plants reproduce using flowers. 4. All plants reproduce using seeds. Warm-up: Write each Question and Answer for Each.
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PLANT CHARACTERISTICS Multicellular eukaryotes Photosynthetic autotrophs containing chloroplasts . Non-mobile (fixed to one spot) Cell walls made of cellulose Responds to environment and grows through the use of hormones Slide # 3
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The ancestors of plants were multicellular green algae . They were completely immersed in water & dissolved minerals. 1. How to get chemical resources (water, minerals, oxygen, and carbon dioxide) separated into air and soil 2. How to transport resources within the plant. 3. How to prevent from drying out 4. How to reproduce without water Plants Make the The Move to Land Slide # 4 To move onto land, plants had to solve these problems :
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Some Adaptations (solutions) - 1. Have body parts extending into both air and soil 2. Develop a vascular system to transport resources in plant 3. Have a protective layer – cuticle (waxy outer layer) to keep from drying out 4. Specialized structures for reproduction including spores & seeds that do not dry out Slide # 5
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Plants are classified based on whether or not they have 1. Vascular System (transport) 2. Seeds 3. Flowers (enclosed seeds) Slide # 6
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Concept Map: Plants are divided 1 st by whether or not they have a vascular system.
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